X x x x x



D. W. TOWER.

Patented Feb. 5, i895.

(No Mode.)

DEVICE FOR UNLATGHING AND OPENING DOORS.

W/TNESSES UNITED STATES PATENT @Printer DANIEL w. rrowER, OE GRANDRAPIDs, MICHIGAN, AssIeNOR rro THE GRAND RAPIDS RRAss COMPANY, OE s-AMEPLACE.

DVIOEYFOR UNLATCHING AND OPENING DOORS.

SPECIFICATION forming part of Letters Patent No. 533,571, dated February'5, 1895;

Application tiled September 10,1894- Scn'al llo. 522,676. (No model.)

To all whom t may concern.-

Be it known that I, DANIEL XV. TOWER, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and useful Improvements in Devices forUnlatching and Opening Doors; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable oth ers skilled in the art to which it appertains to make and usethe same.

My invention relates to improvements in a device for unlatcliing andOpening doors, and its object is to provide the same with certain newand useful features, hereinafter more fully described, and particularlypointed out in the claims, reference being had to the accompanyingdrawings, in which Figure l is a front elevation of a device embodyingmy invention; Fig. 2, a vertical section of the same on the line 2-2 ofFig. 1; and Fig. 3 a detail showing a modified 'construction of thesame.

Like letters refer to like parts in all the figures.

A represents a portion of the door, and A a portion of the casingthereof, and B a latch to secure the door when closed.

D is a vertically movable rod engaging the latch to lift the same,extending downward through a casing E and pressed downward by a springL. A pin F engages a slot E in said casing and limits the verticalmovement of said rod and also prevents its turning on its axis. Thelower end of said rod is enlarged to form a shoulder to engage thespring, and to receive a roll G at the lower end thereof, which extendsbelow the casing Pivoted in a suitable bracket l, and beneath said rollis a bell crank H, the horizontal arm of which engages said roll, andthe other arm of said bell crank extends downward and outward and isprovided with a foot plate H. Latches having horizontally sliding boltsB', Fig. 3, are preferred for use in conjunction with this device. Theselatches are made with a lug .I on the bolt B and a bell crank K, havingavertical arm engaging said lug, and a horizontal arm engaged by theupper end of said rod D, is pivcted on the base plate whereby said boltmay be moved back by the upward movement of said rod.

The operation of my device is as follows: By placing the foot on theplate H', and de pressing the same the rod D rises and releases thelatch B, or bolt B as the case may be. The horizontal arm of the bellcrank H now forms an inclined plane engaging the roll G, andthe pressureof thespringL, throws the weight of the door on said roll which roll atonce traverses the said inclined plane of the bell crank, the action ofthe spring fol-A lowing the descent of the roll along the same and thusgiving an impetus to the door to throw it open.

What I claim isl. In combination with a door having a latch, avertically movable rod engaging the latch lto open the same, and apivoted lever engaging the lower end of said rod, and forming aninclined plane to be traversed by the same, to open the door,substantially as described.

2. In combination with a door, and alatch for the same, a verticallymovable rod engaging the latch to open the same, a spring depressingsaid rod, a roll in the lower end of said rod, a bell crank leverengaging said roll, to' lift said rod and form an inclined plane to betraversed by said roll,substantially as described.

3. In combination with a door, having a horizontally movable bolt, a lugon said bolt, a bell crank the upper end of which engages said lug, avertically movable rod engaging said bell crank, and a pivoted leverengaging the lower end of said rod and forming an inclined plane to betraversed by the same, substantially as described. f

4. In combination with a door having a latch, a vertically movable rodengaging said latch, a casing surrounding said rod and having a verticalslot, an enlarged lower end on said rod, a spring within the casingengaging the same, a pin in said rod engaging said slot, a roll in thelower end of said rod, abell crank engaging said roll and forming aninclined plane to be traversed by the same, and

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5. Adooropenereonsisting ofarod,adapted 7. A door opener consisting ofa` horizonto be movably attached to the door, in entally movable bolt,having a lug, a hell crank gagement with the latch, and a bell crankleengaging said lug, a rod to engage said bell 15 ver adapted to beattached to the casing in crank lever, and a pivoted lever to engage 5engagement with the end of said rod, suband move said rod,substantiallyas described. stantially as described. ln testimonjyT whereof I afx mysignature G. A door opener consisting of a rod having in presenceof twowitnesses. an enlarged end having a piu and roll ati ,T tached, a springsurrounding said rod a cas- DANIEL W flo ER' 1o ing having a slot toengage said pin and a Titnessesz bell crank lever to engage said roll,snbstan- LOIS MOULTON, t

tiallyas described. LUTHER V. MoULToN.

